homemade telescope focuser

. Focuser (GSO 2 speed low profile Crayford): $139 Ebony star strips: 2 @ $10 Ebony star ring: $59 Teflon strip: $11 Telrad base: $10 Baltic Birch " sheet (60X60): $42 Baltic Birch 5/8" sheet (60X60): $48 Circle cutting jig: $30 Birch Veneer (4X8 piece): $65 Hardware, stain, other supplies: $80 Total cost for supplies for this project: $1700 Community Forum Software by IP.BoardLicensed to: Cloudy Nights. I had initially allowed for more of a gap, but realized once I cut the pieces and held the tube inside them that my gap was too large. The focuser is very smooth. Every primary telescope mirror has a fixed focal length thats usually 4 to 6 times the width of the mirror. Slewing to find an object and then tracking an object on the sky, so when you make a homemade telescope on the motorisation process you will need high speed for slewing and low speed for tracking or fine movements. I didn't receive any confirmation email after a few days, so I tried to send them an email. It took about 3 weeks but, since Anttler's did not even reply to the Paypal dispute, I received a Paypal refund. Pioneered by John Dobson in the 1960s, the instrument combines a Newtonian reflector telescope with a unique two-axis movable base. Low, or Zero slop when changing direction. Before attaching the sides and front to the bottom with wood screws, I wanted to make sure those screws would not interfere with the Ebony Star ring that would be attached to the rocker bottom. the tube is cardboard as well, you can also get a quality mirror at telescope.com for much cheaper. Step 3The Side Bearings and Rocker Sides. until a 2" eyepiece or 1.25" adapter is snug. you could probably space the bearings 3/4" apart instead of 1" and mount was straight so I wouldn't get a wobbly knob. To hold the tube in place within the tube box, I used a combination of pieces of felt inside the box and wooden shims between the tube and the box. Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . I wanted to finish that instructable before the contest ended but was too late :-). I redrilled the holes for the mirror cell and got ready to wrap it. Most of these have one or two set screws. My homemade motorized telescope focuser for Celestron C8. The blue pieces of the rocker box and ground board are arranged as in the diagrams in (figure 2). Did you make this project? The sides were attached with wood glue and clamps with a few small brads to hold everything in place. I used the "LEDandBuzzer" and "TestStepsDRV8825" tests. The focal length of the mirror is 61 inches. I could not find a spacer to fit my 9/16 hole, so I bought the 11/16 spacer (1 1/8 long because that's what the store had) and a bit of the same size. Today I purchased what is called atank nipple in India. As the telescope tilts toward the horizon, the mirror must be supported on its edge. 1/4" x 20 bolt, and the nylon bolt end against the smooth knitting I did not wrap the tube until I had completed the base. I This was to allow the circle cutting jig to be attached to the board to cut the arcs from a center point of 25 inches above the ground. Here is what I was working on but looks like I need a better design. I wasn't there so i can be 100% but i do not think my friend was lying to me and i believe the pictures are from my telescope my kids use it for stargazing a lot i have seen some deepspace but i use it mainly for sketching the moon and i like to view solar flares. Two of the holes for the bolts were blocked by knobs. And bolt to scope My telescope is the Orion ED80T-CF. forward and back along with the drawtube when you focus, and you'll get The cutting diagram in (figure 1) shows how I cut the required pieces from two 60 X 60 pieces of Baltic Birch plywood, one inch thick, and one 5/8. This sure is going to be a project I will work on. I then ran a bead of glue on the mark, and after it dried I cut out the nylon up to the glue. narrow the frame. Actually getting the parts into my hands turned out to be more of a challenge than I would have expected, but in the end, I have a wonderful telescope that I enjoy very much. I call shenanigans on every picture in this post except for the the moon. "); Install on Windows 10, this part is pretty straightforward. That's pretty much the focuser. Several functions may not work. Crayford focusers are considered superior to entry-level rack and pinion I tried to call, but the voice mail had a recording stating that the customer was unable to receive messages. occurred to me that a square turned 45 degrees would give me two flat So, as they say, "back to the drawing board". i am not trying to win this contest with photos. I had talked with their owner about mirrors and mirror cells once, and I was very impressed by his knowledge of telescope building. A Pocket Sundial From a Broken Pocket Watch! an eyepiece. I want to make this direct drive system work. And a couple of upright bearing blocks. Home centers and hardware stores did not carry large sizes. There are sub-folders for the different versions. The curved sides of the Side Bearings are also covered with strips of Ebony Star that glide on the teflon pads on the curved edges of the Rocker Sides (figure 3). Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics. You really need a step ladder even for my 10" when pointed overhead. I welded mine from steel square tubing. The specific hardware used for this is described on the Building page. I told them I was on my way. (Sorry you on Step 3. Whether you need a basic rack-and-pinion telescope focuser for your homemade telescope project or a premium Crayford-type model with dual-speed focusing as a performance upgrade, you have come to the right place. Finally, attach your polar alignment device and align it with the hinge. I feel it is a wonderful thing to free oneself from the "store-bought" world, as Tombaugh did, and to use your imagination and skills to develop your own, personal way of viewing the sky. I ordered the focuser, received an immediate email confirming the order, and it arrived two days later. The little app is simple and works great. Star Adventurer Pro Pack Counter Weight Bar Thumb Screw Upgrade. These will be stored in your browser only with your consent and you have the option to opt-out. Let me see if I can get similar plumbing parts here. Nice looking telescope. Here are a few photos of the "bracket", which is a simple 3D printed plate that mounts to the telescope's focuser ring, and serves as a mount for the stepper motor. I wanted a tight / press fit, so I only added half that, 0.25mm. But who cares, really? Obviously an open truss telescope. This extra space would allow the tube to be repositioned within the tube box to rotate the eyepiece or balance the tube. They're fairly Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. The rocker sides are each made of two identical pieces of inch plywood glued together, creating two sides one inch thick. Find a special something for the makers in your life. Dobsonian telescopes are popular with amateur telescope makers for their ease of design and construction, portability, and their use of large optical mirrors. This project is based on Robert Brown's "Arduino ASCOM Focuser Pro2 DIY". my thoughts naturally gravitated toward a boxy focuser to go with it. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . The 2-1.25" adapter is a sink drain slip fitting in 1-1/4" size that slips into the large tube for 1.25 EP's. Sew the seam, and sew an elastic cord into the top to secure it to the secondary cage. When you're ready to go on to testing with the windows driver, you want "myFP2_DRV8825_312-1", open that folder. It doesn't. A tilted focuser will have no effect on the image quality. Ask Question Step 5: Stepper Motor Choice #2 - NEMA-17 Geared Stepper Motor If your optical train is heavy and the focuser has to bear it (see above) then this motor may be a better choice. This one is based on the DRV8825 driver chip and a NEMA-17 stepper motor. I had some carboy caps that make good knobs. After you've done that, put a couple of tiny pan-head screws Please explain, in detail, how you attached your tube to the very unique drive system of an XT12G mount. Fairly easy to build and could be adapted to suit any SCT focuser. It may need some careful coaxing with a screwdriver. DO NOT drill out the holes in the board! I don't *do* pretty. can't click on it or copy and paste it; it's a graphic file to thwart I am well versed in technology, have all the tools necessary to build my own! Our websites use cookies to improve your browsing experience. In the "ARDUINO FIRMWARE" folder, in it you will find a ZIP file "myFP2-Firmware 312-1.zip". I It interfaces to the computer via USB and comes with an ASCOM driver. All in all it seemed like a pretty robust design, so I gave it Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. Deep space photos like these require HOURS of exposure for each one. Im sorry to hear you couldn't make the contest. SDO/HMI Continuum Image on 2023.03.04 at 1259 UT, Remote computer working with no extra networking. Several of my Recent Images have been focused with this system. This unit takes signals from your computer and drives the stepper motor on the focuser. needle adds no friction that I can feel to the focus action. DIY Craford Focuser. I want to put my 12.5 mirror in a collapsible structure so I can haul it easy, Say a truss tube design, 7 years ago Plus it comes in black, so I drew a guide line straight down the side of the tube and cut the veneer to length with one extra inch on each side68 inches long. I pointed it at distant trees and had no problem bringing the image into focus with all of my eyepieces. Before I wrapped the tube (and before I discovered the problem with the primary placement) I determined the balance point on the tube. On the cutting diagram, you can see that the side bearings were cut 26 inches long. In addition, we use third-party cookies to help us analyze and understand usage. Drawing lines between opposite corners of the tube box sides allowed me to locate the center point on each side. This resulted in a gear that wasn't true and "wobbled" a bit. CNC files (optional) Download the Sketchup files. Quick demo of my motorized focuser, and I will create a detailed tutorial if enough people are interested. Unfortunately I don't have a 3d printer. I'm also going to focus on only one version of Robert's focuser (there are many). My other telescope is a Celestron NexStar C6E. on Introduction. 4 years ago So I decided to make my own, using my normal "blunder in naively and see what happens" approach to making things. Dozens of projects in every issue covering electronics, craft, fabrication, and more, Learn tips and skill-building tutorials from experts in the maker community. I will post the pic of final focuser once ready. Only problem is if I put a diagonal it wants to rotate the helical part. Until I see photos of this scope setup for these pictures and an explanation of the exact equipment used, I cannot believe that these pictures were taken with this OTA.

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